Calipers



A. A. COY LE Feb. 15

CALI PERS 1926 2 Sheets-Sheet l Filed March 51 WVIIIIIII Patented Feb.15,1927.

Y ALBERT A, COYLE, OF ST. LOUIS, MISSURI.

CALIPRS.

'Application ledfMarch 31, 17926.k Serial No. $58,905.

The present invention relates tonew and useful improvements in calipers,and'more particularly calipers of the micrometer type, the primaryobject of the invention being to provide Va caliper ot a novelconstruction and .especially designed for determining outer diameters aswell as inner diameters.

Another obye'ct of the invention is to ,provide a registering 'caliper'having exeeptionally Wide range, combining the usefulness of severaltools into a simple, compact, positive quick-acting and serviceableumt,thereby increasing the capacity of the operationsV y the requirementsote'xpertvmechancs.

ENith the foregoing and other objects in View .vhich will appear asthedescription proceeds, the invention resides in the combination andarrangement of parts and in 1 7, the details of construction hereinafterdevscribed and claimed, it being understood that changes in the preciseembodiment ot the invention herein disclosed, may be made Within thescope or what is claimed, without departing from the spirit of theinvention.

.Referring to the drawings: Figure 1 is an elevational view of a measfiiriiig instrument constructed in accordance with the invention. i

Figure 2 is a sectional view taken on line 2-2 et Figure 1.

lFigi-.ire 3 is a tragmental sectional view through the lower portion ofthe instrument and taken on line 3-3 ot'lTigureQ.

l*-1 igiire 4T is a sectional detail view of the cuter end ot theinstrument.

Figure 5 is a sectional viewr taken on line ot Figure 1.

Figure 6 is an elevational view of the controlling rod ot theinstrument. Y

Referring to the drawings in detail, the d vice includes a body portionindicated generally by the reference character 5, which is provided withlat-eral enlargements G that are cut away as at 7 to accommodate thelower ends oi the legs of the instrument, to be hereinafter more fullydescribed.

A cover plate indicated at 8 is formed with suitable openings toaccommodate the securing screws 9 that 'also pass `into .open' ings ofthebody portion 5 to secure the cover plate in position. l

The, main or omt su aortinv' lers'of the instrument are `arranged inpairs as shown byligure 1, eachfpair including legs lOand 11respectively, which are ot aV particular constructionand as shown,haveendportions r12 extending at substantially righty angles withrespect to the main portions` A,

thereof, the ends of the right angled 'por tionsf12 being formed withheads 13 that are aperture-d tor receive the pinsr 14 that are carried`bythe body portion 5 to pivotally legs 10and 11 lto the body por-tsecure the tion. Y Y A rlhe outer ends of the :legs l10 and 1lljare also:formed with `heads 15 that have ope'nf` ings to receive the supportinglpins 16 :that

pivotally connect'the point Vsuppe'rting members 17, it being understoodthat eachsup-y porting A.mennber 'includes a rearwardly, eX- tend'edportion 18 formed with an opening to receive the pin 16,`to the endithatas the leg members 10 and llare moved, the members 1( lwill also move,btit will be held 'in the saine plane at all timesto insureac'curatemeasuringl v Y .l

l hrea'ded `openings are #formed f in the members 17, as shown by Figure4 ofthe' drawings, which openings accommodate the .threaded extremities19 ofthe removable points 20, nuts 21 being Aprovidedfor 'locking thepoints 2O within the openingsiolt the members 17.

Extending laterally from the members 1"(` are extensions 22 Vthat areformed with threaded openings to receive the pins 28 which may beutilized for measuring inner diameters, as for example, by placing theinstrument within a pipe so that the pins 23 contact with the innersurfaces thereof while the points may be used ktoi' measuring outerdiameters, by placing the instrument over a circular object in such away that the pointsA 20 rest against the outer surfaces of the circularobject. y

AThe operating mechanism includes an operating rod 24: that passesthrough an opening 'formed in the body portion, the inner end of the rod24C being providedwith a head 25 which is cut away to receive the ad-Vjacent ends of the arms'26 and 27, there being provided a connecting pin28 extending therethrough to connect the arms 26 and 27 to the -rod24;'. I

Secured to the body portionY 5is a barrel "29 that is provided with athreaded portion I 3() disposed adj aoent to its lower end, whichthreads cooperate with the threads 31 'ormedinteriorlyof the'sleeve32,-which has a beveled edge 33 provided with graduations as shownbyFigures l and 2 with the result that when the sleeve 32 is rotated,cerV `tain graduations 34 of -the barrel'29 are uncovered to indicatethe distance that the legs l0 and 11 move, which graduations cooperatewith graduations 34 providedv on the Y barrel 29. 1 f

4shown byFigure .3, the lower end of therod 24 lssnpphed -wlth acircular enlargement 35 adapted..-to engage the lnner Vsnrt'aceofthe'bottom ot' the sleeveg82,

the'end'of the rod passing through an opening `formedv in the bottom 36where it-V is formed' with internalthre-ads to receive the screw.A37'for. securing the rod 2d to the sleeve "32 in such a way as topermit of rotarylirioven'ient oftheA sleeve 32 around the rOdQ/l, and.owingto the fact `that the rod 24' isV carried by the sleeve 32, it willbe obvious that the rod24 will be moved through theopening of thebodyportion 5, to adjust the'legs ofthei'nstrument in a: manner as shownin dotted lines inFigure l of the drawingsf From the oreg'oingit will beobvious that `dueto this construction, the control nut or Vsleevep),when operated, vwillaot to move Vthe members 17 inwardly or outwardly,ac-v cording to theV direction of rotation of thev sleeve 32, with'theresult 'that the points 2O andv23 carried thereby are held inhorizontaljplanes' to aecomplish the purpose of the Vscription of the rYI claim:

invention. i

In view of the foregoing detail description, itis thought that a furtherdetail deinvention, is' unnecessary. 1. Acaliper inoluding a bodyportion, leg

members embodying outwardly and up-l wardly extended portions pivotallyconnected with the body portion, inwardly extended pins carried by theleg members,.out wardlyl .extended pins ,carried by the leg members, abarrel secured to the body por 'tionv and having graduations thereon, a

sleeve mounted orrotation on the barrel and adapted to movelongitudinally of the barrel, an operating rod extending through thebarrel and having connection with the sleeve, saidrod passing throughthe body portion, arms'pivotally connected Withthe rodand adapted tomove the leg members Vtowards each other, when the rod is moved in onedirection,v and said farm'adapted. to move the. leg members away fromeachother when the rod'is moved in the opposite direction." 'y

2. A caliper including a body portion having aA central opening, apairof pivoted le@- members supported at each side of the body portion, abarrel secured tothe body portion, said barrel having'A a threadedportion, a sleevev having threads operating over the threaded portion,said sleeve and barrel.

havino' coo erat-inov efraduations a rod eX- e a r .v tending throughtheaopenmg 1n the'body portion andv having connection with the as myown, I have hereto amazed my signature.

ALBERTA. ooYLn.

